<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
        <style>
            select{
                -ms-progress-appearance: none;
                -moz-appearance: none;
                -webkit-appearance: none;
                width: 100px;
            }
            ::-ms-clear{
                display: none;
            }
            ::-ms-reveal{
                display: none;
            }
            ::-ms-expand{           /*ie9 不兼容*/
                display: none;
            }
        </style>
	</head>
	<body>
        <input type="text">
        <select name="" id="">
            <option value="">a</option>
            <option value="">b</option>
            <option value="">c</option>
            <option value="">d</option>
        </select>
	</body>
    <script>
    </script>
</html>